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ID:36520833
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页数:6页
时间:2019-05-11
《连续梁桥摩擦摆支座参数分析与优化》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、桥梁建设2015年第45卷第1期(总第230期)2OBridgeConstruction,Vo1.45,No.1,2015(TotallyNo.230)文章编号:1003—4722(2Ol5)01—0020—06连续梁桥摩擦摆支座参数分析与优化吴宜峰,李爱群,王浩(东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096)摘要:为实现用于连续粱桥的摩擦摆支座隔震性能的最优化,以位于高烈度区的(48+66+48)m三跨预应力混凝土连续箱梁桥西安太白大桥为背景进行研究。应用非线性动力时程分析方法计算该桥在不同摩擦摆支座参数组合下的隔震效果,研究支座参数对隔震效果的影响;在此基础
2、上,基于模糊逻辑控制理论,引入摩擦摆支座综合隔震性能指标,对支座参数进行优化分析。结果表明,摩擦摆支座弯矩隔震效果明显,位移隔震效果分歧较大;通过模糊逻辑控制方法,可实现弯矩、位移隔震效果的平衡;为实现摩擦摆支座隔震性能最优化,摩擦系数需控制在0.O6~0.10。关键词:连续梁桥;摩擦摆支座;隔震率;参数分析;优化;模糊逻辑控制;隔震性能指标中图分类号:U448.215;U443.36文献标志码:AParameterAnalysisandOptimizationofFrictionalPendulumBearingsforContinuousGirderBridgew【,11/一feng
3、,LJAi—qun,WANGHao(KeyLaboratoryofConcreteandPrestressedConcreteStructuresofMinistryofEducation,SoutheastUniversity,Nanjing210096,China)Abstract:TooptimizetheseismicisolationperformanceOfthefrictionalpendulumbearings(FPBs)usedforcontinuousgirderbridge,theTaibaiBridgeinXian,athree—spanprestressedco
4、ncretecontinuousboxgirderbridgewithspanarrangement(48+66+48)mlocatedinthehigh—intensityseismiczonewascitedasanexampleandwasstudied.Thenonlineardynamictime—his—toryanalysismethodwasusedtocalculatetheseismicisolationeffectoftheFPBsofdifferentpa—rametercombinationsandtheinfluencesoftheFPBparameterso
5、ntheseismicisolationeffectwerestudied.Furthertothecalculationandstudy,thecompositiveseismicisolationperformanceindicesoftheFPBswereintroducedandtheoptima1analysisoftheFPBparameterswaseondue—tedbasedonthefuzzylogiccontroltheory.Theresultsofthestudyandanalysissuggestthattheseismicisolationeffectoft
6、heFPBsonthebendingmomentiSnotable,butonthedisplacementbetweenthegirderandpiersisambiguous.Withthefuzzylogiccontroltheory,thebalanceoftheseismicisolationeffectonthebendingmomentanddisplacementcanbeachieved.ToachievetheoptimizationoftheseismicisolationperformanceoftheFPBs,thefictionalcoefficientsof
7、theFPBSshouldbecontrolledwithin0.06~O.10.Keywords:continuousgirderbridge;frictionalpendulumbearing;seismicisolationrate;pa—rameteranalysis;optimization;fuzzylogiccontrol;seismicisolationperformanceindices1引言整体性能好、结构刚度大
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